Bang or Bang Bang is commonly used to refer to the drug Cocaine and it's use. This use originates from the famous catch phrase of the wrestler 'Cactus Jack' and is an extension of the previous use of Bang in the related area (ie; 'Let's just bang a few more lines before we go out.' or 'bang out a couple of lines and then we'll get going!'

An adjective that females use to describe an OVERLY attractive male.

screwing around;messing around
otherwise known as
doing it!

As said before, a phrase used by emos/scenesters on sites like myspace...and also as a stated before it is accompanied by a crappy graphic of a gun, which is usually a pistol (more specifically a berettta 92-fs for some reason) or and m-16 or ak-47. These graphics will always have one or more of these characteristics:
-glitter
-blood or some other liquid dripping out of the barrel
-a rose protruding out of the barrel

a tatto on lil waynes chest that symbolise him shooting himself in the chest as a child

Something you say before you give your boy a slap ass. A friendly gesture that shows inclusion.

What gross people like to do together when they're bored